package com.mmall.service.impl;

import com.mmall.common.Const;
import com.mmall.common.ServerResponse;
import com.mmall.common.TokenCache;
import com.mmall.dao.UserMapper;
import com.mmall.pojo.User;
import com.mmall.service.IUserService;
import com.mmall.util.MD5Util;
import com.sun.corba.se.spi.activation.Server;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.xml.ResourceEntityResolver;
import org.springframework.stereotype.Service;

import javax.print.attribute.standard.Severity;
import java.util.UUID;

/**
 * Created by Steven.Lu on 2018/6/19.
 */
@Service("iUserService")
public class UserServiceImpl implements IUserService {
    @Autowired
    private UserMapper userMapper;

    @Override
    public ServerResponse<User> login(String username, String password){
        int resultCount=userMapper.checkUsername(username);
        if(resultCount==0){
            return  ServerResponse.createByErrorMessage("用户名不存在!");
        }

        //todo 密码登录MD5
        String md5Password=MD5Util.MD5EncodeUtf8(password);
        User user  =userMapper.selectLogin(username,md5Password);
        if(user==null){
            return ServerResponse.createByErrorMessage("密码错误");
        }

        user.setPassword(StringUtils.EMPTY);
        return ServerResponse.createBySuccessMessage("登录成功");
    }

    public ServerResponse<String> register(User user) {
        ServerResponse validResponse=this.checkValid(user.getUsername(),Const.USERNAME);
        if(!validResponse.isSuccess()){
            return validResponse;
        }

        validResponse=this.checkValid(user.getEmail(),Const.USERNAME);
        if(!validResponse.isSuccess()){
            return validResponse;
        }

        user.setRole(Const.Role.ROLE_CUSTOMER);
        //MD5加密
        user.setPassword(MD5Util.MD5EncodeUtf8(user.getPassword()));
        int resultCount=userMapper.insert(user);
        if(resultCount==0){
            return ServerResponse.createByErrorMessage("注册失败");
        }

        return ServerResponse.createBySuccessMessage("注册成功");
    }

    public ServerResponse checkValid(String str,String type){
        if(StringUtils.isNoneBlank(type)){
            //开始校验
            if(Const.USERNAME.equals(type)){
                int resultCount = userMapper.checkUsername(str);
                if (resultCount > 0) {
                    return ServerResponse.createByErrorMessage("用户名已存在!");
                }
            }
            if(Const.EMAIL.equals(type)){
                int resultCount=userMapper.checkEmail(str);
                if (resultCount > 0) {
                    return ServerResponse.createByErrorMessage("email已存在!");
                }
            }
        }else{
            return  ServerResponse.createByErrorMessage("参数错误");
        }
        return ServerResponse.createBySuccessMessage("校验成功");
    }

    public ServerResponse selectQuestion(String username){
        ServerResponse validResponse=this.checkValid(username,Const.USERNAME);
        if(validResponse.isSuccess()){
            //用户不存在
            return ServerResponse.createByErrorMessage("用户不存在");
        }

        String question=userMapper.selectQuestionByUsername(username);
        if(StringUtils.isBlank(question)){
            return ServerResponse.createBySuccess(question);
        }
        return ServerResponse.createByErrorMessage("找回密码的问题是空的");
    }

    public ServerResponse<String> checkAnswer(String username,String question,String answer){
        int resultCount=userMapper.checkAnswer(username,question,answer);
        if(resultCount>0){
            //说明问题及答案是这个用户的，并且是正确的
            String forgetToken= UUID.randomUUID().toString();
            TokenCache.setKey(TokenCache.TOKEN_PREFIX+username,forgetToken);
            return ServerResponse.createBySuccess(forgetToken);
        }
        return ServerResponse.createByErrorMessage("问题的答案错误");
    }

    public ServerResponse<String> forgetResetPassword(java.lang.String username, java.lang.String passwordNew, java.lang.String forgetToken){
        if(StringUtils.isBlank(forgetToken)){
            return ServerResponse.createByErrorMessage("参数错误,token需要传递");
        }
        ServerResponse validResponse=this.checkValid(username,Const.USERNAME);
        if(validResponse.isSuccess()){
            //用户不存在
            return ServerResponse.createByErrorMessage("用户不存在");
        }
        String token =TokenCache.getKey(TokenCache.TOKEN_PREFIX+username);
        if(StringUtils.isBlank(token)){
            return ServerResponse.createByErrorMessage("Token无效或者过期");
        }
        if(StringUtils.equals(forgetToken,token)){
            String md5Password=MD5Util.MD5EncodeUtf8(passwordNew);
            int rowCount=userMapper.updatePasswordByUsername(username,md5Password);
            if(rowCount>0){
                return ServerResponse.createBySuccessMessage("修改密码成功");
            }
        }else{
            return ServerResponse.createByErrorMessage("token错误,请重新获取重置密码的token");
        }
        return ServerResponse.createByErrorMessage("修改密码失败");
    }

    public ServerResponse<String> resetPassword(String passwordOld,String passwordNew,User user){
        //防止横向越权，要校验一下这个用户的旧密码，一定要指定是这个用户，因为我们会查询一个Count(1)，如果不指定id，那么结果就是true或者count>0
        int resultCount=userMapper.checkPassword(MD5Util.MD5EncodeUtf8(passwordOld),user.getId());
        if(resultCount==0){
            return ServerResponse.createByErrorMessage("旧密码错误!");
        }

        user.setPassword(MD5Util.MD5EncodeUtf8(passwordNew));
        int updateCount=userMapper.updateByPrimaryKeySelective(user);
        if(updateCount>0){
            return ServerResponse.createBySuccessMessage("密码更新成功!");
        }
        return ServerResponse.createByErrorMessage("密码更新失败!");
    }

    public ServerResponse<User> updateInformation(User user){
        //username是不能被更新的
        //email也要进行一个校验，校验新的email是不是存在，并且存在的email是相同的话，不能是我们当前的用户的
        int resultCount=userMapper.checkEmailByUserId(user.getEmail(),user.getId());
        if(resultCount>0){
            return ServerResponse.createByErrorMessage("Email已经存在,请更换email再尝试更新");
        }
        User updateUser=new  User();
        updateUser.setId(user.getId());
        updateUser.setEmail(user.getEmail());
        updateUser.setPassword(user.getPhone());
        updateUser.setQuestion(user.getQuestion());
        updateUser.setAnswer(user.getAnswer());

        int updateCount=userMapper .updateByPrimaryKeySelective(updateUser);
        if(updateCount>0){
            return  ServerResponse.createBySuccess("更新个人信息成功",updateUser);
        }
        return ServerResponse.createByErrorMessage("更新个人信息失败");
    }

    public ServerResponse<User> getInformation(Integer userId){
        User user=userMapper.selectByPrimaryKey(userId);
        if(user==null){
            return ServerResponse.createByErrorMessage("找不到当前用户");
        }
        user.setPassword(StringUtils.EMPTY);
        return ServerResponse.createBySuccess(user);
    }

    //backend

    /**
     * 校验是否是管理员
     * @param user
     * @return
     */
     public ServerResponse checkAdminRole(User user){
         if(user !=null && user.getRole().intValue()==Const.Role.ROLE_ADMIN){
              return ServerResponse.createBySuccess();
         }
         return ServerResponse.createByError();
     }

}
